A review of Queensland high school assessment methods is set to recommend an overhaul of the university entrance score, known as the OP.

The Australian Council for Educational Research (ACER) is conducting an independent review of state senior assessments and the tertiary entrance system, which was due to be completed by the end of July.

The report is now expected to be handed to the State Government by the middle of August.

ACER's reviewers, Dr Gabrielle Matters and Professor Geoff Masters, believe the Overall Position (OP) system should be scrapped.

"The OP system should be discontinued - the OP is no longer sustainable," Dr Matters said.

The OP score ranks student positions from one to 25 and is used solely for tertiary entrance.

Dr Matters said while it had been a good system, it was no longer used by all students in Queensland.

"Only half of the students actually use the OP to get to university," she said.

"Which means we have a binary system really where OP is used for half of them and others get there through another route, which doesn't involve the fairness of the OP."

Dr Matters said they were also looking at recommending changes to subject assessment.

Subjects would no longer be given the five-scale achievement level from Very High Achievement (A) to Very Low Achievement (E), and the recommendation was to replace it with a 60-point scale.

In each subject, students would have to complete three school-based assessments set by teachers, as currently occurs.

We will consider all of that and make sure people have ample time and are properly resourced.

John-Paul Langbroek, Education Minister

However, one external assessment was being recommended.

Queensland Teachers Union president Kevin Bates said he was concerned about any introduction of external assessment.

"We have severe concerns about having any type of external assessment introduced because for us it's the thin edge of the wedge," he said.

"Our concern is once you have started down that particular path then the inevitable outcome will be all assessment would become external because they see that as the best option they should pursue."

Dr Matters said a university ranking based on a 60-point score for each subject would have to be conducted by the Queensland Tertiary Admissions Centre.

She said the system being recommended would still enable universities to obtain an Australian Tertiary Admission Rank (ATAR) for Queensland students.

"Universities have made it clear they want to use an ATAR - we just don’t happen to believe it is the right thing," Dr Matters said.

Queensland Education Minister John-Paul Langbroek said he was looking forward to seeing the recommendations.

He said no decision would be made without consultation with schools, universities, unions and school principals.

"We will consider all of that and make sure people have ample time and are properly resourced and properly informed before we make any changes which wouldn't happen before 2016."